Count Wilhelm of Nassau-Usingen was a German nobleman born in 1651. He belonged to the House of Nassau, a prominent family in European history. Wilhelm ruled the small principality of Nassau-Usingen and was known for his efforts to modernize the region and improve its economy. During his reign, Wilhelm focused on enhancing infrastructure and promoting trade. He was also involved in various military and political alliances, which were common among European nobility at the time. His leadership contributed to the stability and development of Nassau-Usingen until his death in 1718.